#!/usr/bin/python
"""spdx-license-expression.py - validate SPDX licence expression

Usage: spdx-license-expression.py <SPDX-License-Identifier Expression>

Author: Brian Inglis <Brian.Inglis@SystematicSW.ab.ca>
"""

from license_expression import get_spdx_licensing
import sys

def main(args):
    if len(args) != 1:
        print("usage: " + sys.argv[0] + " <SPDX-License-Identifier Expression>",
              file=sys.stderr)
        return 1

    licensing = get_spdx_licensing()
    expression = args[0]
    errs = licensing.validate(expression).errors
#ExpressionInfo(
#   original_expression='... and MIT and GPL-2.0+',
#   normalized_expression=None,
#   errors=['Unknown license key(s): ...'],
#   invalid_symbols=['...']
#)
    for e in errs:
        print(e, file=sys.stderr)
    if len(errs) >= 1:
        return 2

if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))